US20140271971A1 - Device to produce briquettes - Google Patents

Device to produce briquettes Download PDF

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Publication number
US20140271971A1
US20140271971A1 US14/184,437 US201414184437A US2014271971A1 US 20140271971 A1 US20140271971 A1 US 20140271971A1 US 201414184437 A US201414184437 A US 201414184437A US 2014271971 A1 US2014271971 A1 US 2014271971A1
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United States
Prior art keywords
screw
hopper
barrel
briquettes
tank
Prior art date
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Abandoned
Application number
US14/184,437
Inventor
Adam Piotr Junczyk
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Individual
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Priority to US14/184,437 priority Critical patent/US20140271971A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/24—Extrusion presses; Dies therefor using screws or worms
    • B30B11/246—Screw constructions
    • B29C47/8815—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C10L5/36—Shape
    • C10L5/361—Briquettes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the subject of the present invention is a method for making briquettes from comminuted straw and a device for producing briquettes from comminuted plant waste.
  • Known methods for making briquettes from comminuted plant feedstock rely on compressing the raw material in a screw-type extruder while heating the extruder barrel and the forming die using electric heaters. During the compression the material solidifies, with the outer layer of a briquette formed having the most compact structure. In order to reduce cross-sectional heterogeneity of the resulting end product, the product is made in the form of a cylinder with a central hollow.
  • Polish patent No 198907 discloses a screw-type briquetting machine having a screw consisting of two segments, the first of which, counting from the inlet has a greater diameter and helix pitch than the other one which serves as a densitying segment of the screw.
  • the barrel working chamber and the die are heated.
  • Fitted at the face of the forming die is an annular die with a guide with pressure control.
  • the screw is supported on bearings and actuated through an electric motor and a gearbox.
  • the extruder barrel is equipped with a chute to supply the feedstock from a hopper.
  • comminuted straw pre-dried to a moisture content between 15 to 25%, is fed to a screw extruder and then gradually compressed until it reaches a temperature above 290° C. and a density above 1.3 g/cm 3 , and the resulting mass is extruded in a continuous process in the form of a cylinder with a uniform structure.
  • a constant temperature span is maintained at the die, not exceeding 340° C.
  • the mass resulting from such compression has a density in the range from 1.3 to 1.5 g/cm 3 .
  • the subject of the present invention is also a device for the manufacture of briquettes from comminuted straw, said device having disposed in the barrel a three-segment screw with different helix pitches, said segment pitches decreasing toward the outlet.
  • the forming die, disposed downstream the screw, is housed in a tank connected via a water system to a pump and a fanned cooler.
  • a temperature indicator and a temperature sensor are installed inside the tank, integrated into the supply system of the pump.
  • the method according to the present invention allows obtaining briquettes with a uniform structure throughout the transverse cross section.
  • the feedstock, heated uniformly throughout its mass has a stable form that does not change during long storage.
  • the raw material is converted into compact briquettes.
  • This process of briquette manufacture results in obtaining a 100% natural and ecological fuel. Since the final product is characterized by a compact structure, its combustion is a process of long duration.
  • the briquetting device according to the present invention is energy-efficient, because attaining the right temperature does not require any heaters.
  • the hopper ensures continuous and uniform feeding of the raw material in the form of comminuted straw.
  • the device is also able to operate at negative temperatures.
  • comminuted rye straw was prepared in a comminutor, then the straw was pre-dried to 20% moisture and fed to the briquetting machine's hopper. After the hopper had been filled with the comminuted straw, the screw feeder and the extruder screw were started simultaneously. The straw was gradually compressed. Screw rotation speed was initially set at 5 rpm and the machine operated at that speed until steam appeared at the outlet of guide 10 , then the speed was increased to 25 rpm. During the operation of the extruder screw, the temperature of the raw materials was rising. Initially, the stabilizing sleeve produced incompletely solidified briquettes.
  • the outgoing product in cylindrical form had reached the required density of 1.3 g/cm 3 .
  • the temperature sensor of the cooling system was set at 50° C. After that value had been exceeded, the cooling system pump was started. Further, the process ran in a continuous mode, provided that the material in the hopper was made-up when necessary. In case that excessive accumulation of raw material is found at the hopper outlet, the rotation speed of the screw feeder driving motor is reduced.
  • Example 2 Comminuted straw, pre-dried to 15% moisture, was fed to the briquetting machine's hopper and processed like in Example 1.
  • the product obtained in the form of a cylinder had a density of 1.4 g/cm 3 .
  • FIG. 1 shows the device in partial cross section along the axis of the barrel
  • FIG. 2 is a side view with a section of the hopper.
  • a screw 3 Inside the barrel 1 which is seated on a foundation 2 there is disposed a screw 3 whose shaft 4 , supported on bearings 5 , is driven by an electric motor 6 through a belt transmission 7 .
  • the screw 3 has three helix segments of decreasing pitch toward the outlet.
  • Bolted at the face of the barrel 1 is a forming die 8 having a conical bore, which is connected to a stabilizing sleeve 9 .
  • the stabilizing sleeve 9 has a guide 10 attached to it.
  • the forming die 8 is housed in a cooling liquid tank 11 which is connected through the water system 12 to a fanned cooler 13 equipped with a fan 14 .
  • the water system 12 is equipped with a pump 15 and a temperature indicator 16 , while at the tank 11 a temperature sensor 17 is installed which is part of the supply system of the pump 15 .
  • the barrel 1 has a chute 18 connected to a hopper 19 , at the bottom of which there is a screw feeder 20 driven by an electric motor 21 while on an inclined wall of tank 19 a rotary scraper 22 is installed whose ends mate the helix of the screw feeder 20 .

Abstract

The subject of the invention is a method for the manufacture of briquettes from comminuted straw, as well as a device to manufacture briquettes from comminuted straw. The method consists in that comminuted straw is compressed in a continuous process using a screw-type extruder until the material reaches a temperature at which the material after pressing solidifies to a density exceeding 1.3 g/cm 3. The device has a screw (3) composed of three segments of decreasing helix pitches toward the outlet. The forming die (8) is housed in a tank (11) connected through a water system (12) to a cooler (13). The cooling system has a temperature sensor (17) installed, said sensor being part of the pump supply circuit (15).

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This Application is a Divisional Application of U.S. application Ser. No. 13/378,533, filed Dec. 15, 2011, which is a Section 371 National Stage Application of International Application No. PCT/PL2010/000049, filed Jun. 18, 2010 and published as WO 2010/147493 A1 on Dec. 23, 2010, the content of which is hereby incorporated by reference in its entirety.
    • TECHNICAL FIELD
  • The subject of the present invention is a method for making briquettes from comminuted straw and a device for producing briquettes from comminuted plant waste.
    • PRIOR ART
  • Known methods for making briquettes from comminuted plant feedstock rely on compressing the raw material in a screw-type extruder while heating the extruder barrel and the forming die using electric heaters. During the compression the material solidifies, with the outer layer of a briquette formed having the most compact structure. In order to reduce cross-sectional heterogeneity of the resulting end product, the product is made in the form of a cylinder with a central hollow.
  • Polish patent No 198907 discloses a screw-type briquetting machine having a screw consisting of two segments, the first of which, counting from the inlet has a greater diameter and helix pitch than the other one which serves as a densitying segment of the screw. The barrel working chamber and the die are heated. Fitted at the face of the forming die is an annular die with a guide with pressure control. The screw is supported on bearings and actuated through an electric motor and a gearbox. The extruder barrel is equipped with a chute to supply the feedstock from a hopper. Solution to the problem
    • SUMMARY
  • According to the present invention, comminuted straw, pre-dried to a moisture content between 15 to 25%, is fed to a screw extruder and then gradually compressed until it reaches a temperature above 290° C. and a density above 1.3 g/cm3, and the resulting mass is extruded in a continuous process in the form of a cylinder with a uniform structure. During the extrusion a constant temperature span is maintained at the die, not exceeding 340° C. Preferably, the mass resulting from such compression has a density in the range from 1.3 to 1.5 g/cm3.
  • The subject of the present invention is also a device for the manufacture of briquettes from comminuted straw, said device having disposed in the barrel a three-segment screw with different helix pitches, said segment pitches decreasing toward the outlet. The forming die, disposed downstream the screw, is housed in a tank connected via a water system to a pump and a fanned cooler.
  • Preferably, a temperature indicator and a temperature sensor are installed inside the tank, integrated into the supply system of the pump.
  • The barrel chute is connected to a hopper equipped with a screw feeder driven by a separate motor. The motor of the screw feeder is equipped with a rotation speed controller. Screw feeder helix mates the arms of a rotating scraper installed on an inclined wall of the hopper.
    • Advantageous Effects of Invention
  • The method according to the present invention allows obtaining briquettes with a uniform structure throughout the transverse cross section. The feedstock, heated uniformly throughout its mass has a stable form that does not change during long storage. In steam environment, the raw material is converted into compact briquettes. This process of briquette manufacture results in obtaining a 100% natural and ecological fuel. Since the final product is characterized by a compact structure, its combustion is a process of long duration.
  • The briquetting device according to the present invention is energy-efficient, because attaining the right temperature does not require any heaters. The hopper ensures continuous and uniform feeding of the raw material in the form of comminuted straw. The device is also able to operate at negative temperatures.
    • DESCRIPTION OF EMBODIMENTS Example 1
  • First, comminuted rye straw was prepared in a comminutor, then the straw was pre-dried to 20% moisture and fed to the briquetting machine's hopper. After the hopper had been filled with the comminuted straw, the screw feeder and the extruder screw were started simultaneously. The straw was gradually compressed. Screw rotation speed was initially set at 5 rpm and the machine operated at that speed until steam appeared at the outlet of guide 10, then the speed was increased to 25 rpm. During the operation of the extruder screw, the temperature of the raw materials was rising. Initially, the stabilizing sleeve produced incompletely solidified briquettes. After 5 minutes, as a result of temperature rise, the outgoing product in cylindrical form had reached the required density of 1.3 g/cm3. The temperature sensor of the cooling system was set at 50° C. After that value had been exceeded, the cooling system pump was started. Further, the process ran in a continuous mode, provided that the material in the hopper was made-up when necessary. In case that excessive accumulation of raw material is found at the hopper outlet, the rotation speed of the screw feeder driving motor is reduced.
    • Example 2
  • Comminuted straw, pre-dried to 15% moisture, was fed to the briquetting machine's hopper and processed like in Example 1. The product obtained in the form of a cylinder had a density of 1.4 g/cm3.
    • Example 3
  • A device for the manufacture of briquettes is reproduced, as an example, in the enclosed drawing in which FIG. 1 shows the device in partial cross section along the axis of the barrel, and FIG. 2 is a side view with a section of the hopper.
  • Inside the barrel 1 which is seated on a foundation 2 there is disposed a screw 3 whose shaft 4, supported on bearings 5, is driven by an electric motor 6 through a belt transmission 7. The screw 3 has three helix segments of decreasing pitch toward the outlet. Bolted at the face of the barrel 1 is a forming die 8 having a conical bore, which is connected to a stabilizing sleeve 9. The stabilizing sleeve 9 has a guide 10 attached to it. The forming die 8 is housed in a cooling liquid tank 11 which is connected through the water system 12 to a fanned cooler 13 equipped with a fan 14. The water system 12 is equipped with a pump 15 and a temperature indicator 16, while at the tank 11 a temperature sensor 17 is installed which is part of the supply system of the pump 15. The barrel 1 has a chute 18 connected to a hopper 19, at the bottom of which there is a screw feeder 20 driven by an electric motor 21 while on an inclined wall of tank 19 a rotary scraper 22 is installed whose ends mate the helix of the screw feeder 20.
  • Although the present invention has been described with reference to preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.

Claims (2)

What is claimed is:
1. A device for the manufacture of briquettes from comminuted straw, having a screw supported on bearings at its base, composed of segments of different helix pitches disposed in a barrel ended with a forming die, downstream which die a guide is disposed, and above the barrel there is a raw material hopper, characterized in that the screw (3) consists of three segments of decreasing helix pitches toward the outlet, while the forming die (8) is housed in a tank (11) connected through a water system (12) to a cooler (13) which has a fan (14), and a chute (18) at barrel (1) is connected with a hopper (19) inside which there is a screw feeder (20) driven by a motor (21), and on an inclined wall of the hopper (19) a rotary scraper (22) is mounted whose arm ends mate the helix of the screw feeder (20).
2. The device according to claim 2, characterized in that in the tank (11) there is installed a temperature sensor (17) which is part of the pump supply circuit (15) of the water system (12).
US14/184,437 2009-06-18 2014-02-19 Device to produce briquettes Abandoned US20140271971A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/184,437 US20140271971A1 (en) 2009-06-18 2014-02-19 Device to produce briquettes

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
PLP-38831406 2009-06-18
PL388314A PL218588B1 (en) 2009-06-18 2009-06-18 Method of manufacturing briquettes from size-reduced straw and the equipment for manufacturing briquettes
PCT/PL2010/000049 WO2010147493A1 (en) 2009-06-18 2010-06-18 Method for making briquettes from comminuted straw and a device to produce briquettes
US201113378533A 2011-12-15 2011-12-15
US14/184,437 US20140271971A1 (en) 2009-06-18 2014-02-19 Device to produce briquettes

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US13/378,533 Division US8703031B2 (en) 2009-06-18 2010-06-18 Method for making briquettes from comminuted straw and a device to produce briquettes
PCT/PL2010/000049 Division WO2010147493A1 (en) 2009-06-18 2010-06-18 Method for making briquettes from comminuted straw and a device to produce briquettes

Publications (1)

Publication Number Publication Date
US20140271971A1 true US20140271971A1 (en) 2014-09-18

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Application Number Title Priority Date Filing Date
US13/378,533 Expired - Fee Related US8703031B2 (en) 2009-06-18 2010-06-18 Method for making briquettes from comminuted straw and a device to produce briquettes
US14/184,437 Abandoned US20140271971A1 (en) 2009-06-18 2014-02-19 Device to produce briquettes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US13/378,533 Expired - Fee Related US8703031B2 (en) 2009-06-18 2010-06-18 Method for making briquettes from comminuted straw and a device to produce briquettes

Country Status (9)

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US (2) US8703031B2 (en)
EP (1) EP2488359B1 (en)
CN (2) CN102481747B (en)
CA (1) CA2765582C (en)
HU (1) HUE026155T2 (en)
PL (1) PL218588B1 (en)
RU (1) RU2528376C2 (en)
UA (1) UA106377C2 (en)
WO (1) WO2010147493A1 (en)

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UA106377C2 (en) 2014-08-26
US8703031B2 (en) 2014-04-22
US20120091617A1 (en) 2012-04-19
HUE026155T2 (en) 2016-05-30
CA2765582A1 (en) 2010-12-23
CN102481747B (en) 2015-11-25
RU2012100314A (en) 2013-07-27
EP2488359A1 (en) 2012-08-22
EP2488359B1 (en) 2015-10-14
CA2765582C (en) 2016-11-22
WO2010147493A1 (en) 2010-12-23
CN105038893A (en) 2015-11-11
RU2528376C2 (en) 2014-09-20
PL218588B1 (en) 2015-01-30
CN102481747A (en) 2012-05-30

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